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Django templates: verbose version of a choice
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In Django templates you can use the "get_FOO_display()" method, that will return the readable alias for the field, where 'FOO' is the name of the field.
Note: in case the standard FormPreview templates are not using it, then you can always provide your own template...
“simple” vs “current” push.default in git for decentralized workflow
...n if a branch with the same name exists on the remote):
$ git checkout -b foo
Switched to a new branch 'foo'
$ git config push.default simple
$ git push
fatal: The current branch foo has no upstream branch.
To push the current branch and set the remote as upstream, use
git push --set-upstream...
`levels
...eadability reasons, I would say it never makes sense because `levels<-`(foo,bar) is the same as levels(foo) <- bar. Using @Marek's example: `levels<-`(as.factor(foo),bar) is the same as foo <- as.factor(foo); levels(foo) <- bar.
– Joshua Ulrich
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What is the difference between instanceof and Class.isAssignableFrom(…)?
...ed with any class objects:
a instanceof int // syntax error
3 instanceof Foo // syntax error
int.class.isAssignableFrom(int.class) // true
See http://java.sun.com/javase/6/docs/api/java/lang/Class.html#isAssignableFrom(java.lang.Class).
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What's the use of do while(0) when we define a macro? [duplicate]
...up several statements into one macro.
Assume you did something like:
if (foo)
INIT_LIST_HEAD(bar);
If the macro was defined without the encapsulating do { ... } while (0);, the above code would expand to
if (foo)
(bar)->next = (bar);
(bar)->prev = (bar);
This is clearly not...
How to split (chunk) a Ruby array into parts of X elements? [duplicate]
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Take a look at Enumerable#each_slice:
foo.each_slice(3).to_a
#=> [["1", "2", "3"], ["4", "5", "6"], ["7", "8", "9"], ["10"]]
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Difference between parameter and argument [duplicate]
...d actual parameter etc.
So here, x and y would be formal parameters:
int foo(int x, int y) {
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}
Whereas here, in the function call, 5 and z are the actual arguments:
foo(5, z);
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How to clear ostringstream [duplicate]
...his method? For example, for (int i=0; i<100; ++i) { std::ostringstream foo; foo << "bar"; std::cout << foo.str() << " ";}. Will this print: bar bar bar [...] or bar barbar barbarbar [...]?
– Thanasis Papoutsidakis
Nov 2 '13 at 15:42
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jQuery dot in ID selector? [duplicate]
... escaped with with two backslashes: \\. For example, an element with
id="foo.bar", can use the selector $("#foo\\.bar").
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Using a string variable as a variable name [duplicate]
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You can use exec for that:
>>> foo = "bar"
>>> exec(foo + " = 'something else'")
>>> print bar
something else
>>>
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